Milan have reportedly agreed terms with Sporting CP for the sale of Carlos Bacca but the striker would prefer to return to Villarreal.
The Colombian international spent last season on loan at the Yellow Submarine, where he netted 15 La Liga goals in just 30 starts.
A Bola say Lisbon-based Sporting have agreed a season-long loan deal with an option to sign the former Sevilla striker, but he is holding off on a return to Spain.
Last week, Calciomercato.com said Villarreal held an interest in bringing the striker back to the club despite their record signings of striking duo Gerard Moreno and Karl-Toko Ekambi this summer.
The Rossoneri are keen to sell the striker, whom they signed in 2015, who reportedly decided to turn down a move to Turkish club Trabzonspor earlier this summer.